package photobox.utils

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import javax.imageio.ImageIO;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

/**
 * Created by Administrator on 2014/10/10.
 */
class ImageUtils {
    /**
     * 把图片印刷到图片上
     *
     * @param pressImg --
     *            水印文件
     * @param targetImg --
     *            目标文件
     * @param x
     *            --x坐标
     * @param y
     *            --y坐标
     */
    public final static void pressImage(String pressImg, String targetImg,
                                        int x, int y) {
        try {
            //目标文件
            File _file = new File(targetImg);
            Image src = ImageIO.read(_file);
            int wideth = src.getWidth(null);
            int height = src.getHeight(null);
            BufferedImage image = new BufferedImage(wideth, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = image.createGraphics();
            g.drawImage(src, 0, 0, wideth, height, null);

            //水印文件
            File _filebiao = new File(pressImg);
            Image src_biao = ImageIO.read(_filebiao);
            int wideth_biao = src_biao.getWidth(null);
            int height_biao = src_biao.getHeight(null);
            g.drawImage(src_biao, 20,20, 23, 23, null);
            //水印文件结束
            g.dispose();
            FileOutputStream out = new FileOutputStream(targetImg);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            encoder.encode(image);
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 打印文字水印图片
     *
     * @param pressText
     *            --文字
     * @param targetImg --
     *            目标图片
     * @param fontName --
     *            字体名
     * @param fontStyle --
     *            字体样式
     * @param color --
     *            字体颜色
     * @param fontSize --
     *            字体大小
     * @param x --
     *            偏移量
     * @param y
     */

    public static void pressText(String pressText, String targetImg,
         String fontName, int fontStyle, int color, int fontSize, int x,
         int y) {
        try {
            File _file = new File(targetImg);
            Image src = ImageIO.read(_file);
            int wideth = src.getWidth(null);
            int height = src.getHeight(null);
            BufferedImage image = new BufferedImage(wideth, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = image.createGraphics();
            g.drawImage(src, 0, 0, wideth, height, null);

            g.setColor(Color.RED);
            g.setFont(new Font(fontName, fontStyle, fontSize));

            g.drawString(pressText, wideth - fontSize - x, height - fontSize/ 2 - y);
            g.dispose();
            FileOutputStream out = new FileOutputStream(targetImg);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            encoder.encode(image);
            out.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }
    /**
     * 生成缩略图
     * @param srcImageFile 源图片文件的路径 File file = new File("文件名");  改为路径
     * @param dstImageFileName 待生成的缩略图片完整路径(生成的格式为：image/jpeg);
     * @throws Exception
     */
    public static void makeSmallImage(String srcImageFileName,String dstImageFileName, int width) throws Exception {
        File srcImageFile = new File(srcImageFileName);
        FileOutputStream fileOutputStream = null;
        JPEGImageEncoder encoder = null;
        BufferedImage tagImage = null;
        Image srcImage = null;
        try{
            srcImage = ImageIO.read(srcImageFile);
            int srcWidth = srcImage.getWidth(null);//原图片宽度
            int srcHeight = srcImage.getHeight(null);//原图片高度
            int dstMaxSize = width;//目标缩略图的最大宽度/高度，宽度与高度将按比例缩写
            int dstWidth = srcWidth;//缩略图宽度
            int dstHeight = srcHeight;//缩略图高度
            float scale = 0;
            //计算缩略图的宽和高
            if(srcWidth>dstMaxSize){
                dstWidth = dstMaxSize;
                scale = (float)srcWidth/(float)dstMaxSize;
                dstHeight = Math.round((float)srcHeight/scale);
            }
            srcHeight = dstHeight;
            if(srcHeight>dstMaxSize){
                dstHeight = dstMaxSize;
                scale = (float)srcHeight/(float)dstMaxSize;
                dstWidth = Math.round((float)dstWidth/scale);
            }
            //生成缩略图
            tagImage = new BufferedImage(dstWidth,dstHeight,BufferedImage.TYPE_INT_RGB);
            tagImage.getGraphics().drawImage(srcImage,0,0,dstWidth,dstHeight,null);
            fileOutputStream = new FileOutputStream(dstImageFileName);
            encoder = JPEGCodec.createJPEGEncoder(fileOutputStream);
            encoder.encode(tagImage);
            fileOutputStream.close();
            fileOutputStream = null;
        }finally{
            if(fileOutputStream!=null){
                try{
                    fileOutputStream.close();
                }catch(Exception e){
                }
                fileOutputStream = null;
            }
            encoder = null;
            tagImage = null;
            srcImage = null;
            System.gc();
        }
    }
}
